Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f849d6594d7fd4…

MALICIOUS

PDF

38.3 KB Created: 2020-09-01 13:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9099c78a44c901a77fb314b8a3f9912e SHA-1: 49c3b39e74c674fc40651fa56a69ac6a6cfd56dc SHA-256: 26f849d6594d7fd4b08ab3dc042c1a50487110f0d4aa0b14c6ccb301cc0a11f4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=cantina+band+piano+score+pdf'. This URL is presented within the document body, disguised as a piano score, to entice users to click it. The PDF also exhibits characteristics of a link farm, with numerous embedded external links, many of which point to static.usrfiles.com. The primary malicious intent appears to be redirecting users to potentially harmful content via the ttraff.link domain.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/wix?keyword=cantina+band+piano+score+pdf
    • https://cdn.shopify.com/s/files/1/0433/9712/0151/files/webewino.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/google_docs_find_and_replace.pdf
    • https://cdn.shopify.com/s/files/1/0432/3613/0983/files/2d_3d_shapes_worksheets_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3502/files/reliability_and_validity_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/bolt_and_nut_sizes.pdf
    • https://static.usrfiles.com/ugd/dba42a_7f309a88a05d400c99d8a1163c0f7bfe.pdf
    • https://static.usrfiles.com/ugd/4c76bf_d918e6f3e8a3438c81fd22f440d5b4a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbd5105def9649e1a620f65a4156f451.pdf
    • https://static.usrfiles.com/ugd/6846fe_9de3e54571144813bca2ae7bb054baf1.pdf
    • https://static.usrfiles.com/ugd/1b8612_139683aca248424595e23d50d2ce03f8.pdf
    • https://static.usrfiles.com/ugd/221f3a_ff5382d2f07044d8be5bc608c6ee07d9.pdf
    • https://static.usrfiles.com/ugd/83b1b3_06415bb01a764099bba5d475ac987bdd.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://static.usrfiles.com/ugd/6846fe_9de3e54571144813bca2ae7

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057b9.bin
4a666f76bc5c669f83f050891872b3fc1eaa5676b1aeeae7834b628ebb406b25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B9 5160 bytes
font_01_sfnt_off00006947.bin
b58d76d8e72417db2178ba9b1fa104806cd448901614f271ef928b0cb003a03d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 10292 bytes

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